Multicast lab 3: Any-Source Multicast with anycast RP

After giving a two-days training to a customer on multicast technology, I take the opportunity to have my lab and the configurations ready to share with you a suite of five different multicast configurations examples. And, how to make some tests and troubleshooting. These examples are based on the labs I used to practice the CCIE R&S practical exam.

Any-source multicast (ASM) with anycast RP

Lab design and description

The network design is the same for every scenario:

I use four layer-3 Cisco 3650 catalyst switches running IOS-XE. With layer-3 ptp interfaces between them to create a small layer-3 network. OSPF is running between the switches to advertise all the networks: the ptp networks, the loopback0 interfaces and the VLAN10 of SW-1, where is the multicast source.

For the multicast source, I use a laptop running two VLC instances, sending video stream traffic to 233.1.2.3 and 234.1.2.3, both on port 30’001.

The receiver will be simulated by the loopback0 interface of SW-4.

(Click on the image to see a larger version)

On this scenario, we will add a new loopback IP (5.5.5.5) on SW-2 and SW-3 to have RP redundancy.

Then, we must configure a multicast source discovery protocol (MSDP) session between the loopback0 IP of SW2 (2.2.2.2) and SW3 (3.3.3.3), to maintain consistent sources information.

Configuration

First, we need to configure PIM on the interfaces between the four switches, on the interface where is source is located (VLAN10 of SW-1) and the interface of the clients or receivers (in this case, the loopback0 of SW-4). For this, we use the ip pim spare-mode command.

Finally, we must configure the RP. For this, we can use static RP, auto RP or bootstrap router (BSR). Here, I will configure static RP on the four switches. And like in the previous labs, I use an ACL to specify the group 233.1.2.3 only:

The Author

Jerome Tissieres is a multi-vendor certified network systems engineer with over 20 years of successful experience in building and operating enterprise, services providers and data-center IP networks.Jerome has also been chosen to be a 2019 Cisco Champion!

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